不同标准建筑物年预计雷击次数计算方法研究

Research on calculation method of annual number of lightning for buildings in different standards

根据国家标准GB 50057-2010和国际标准IEC 62305-2:2010中给出的建筑物年预计雷击次数的计算方法,分别对校正系数/位置因子、建筑物所处地雷击大地的年平均密度、建筑物截收面积3个分量进行了对比分析,并研究了不同条件下两个标准中年预计雷击次数比值与建筑物长、宽、高等的关系。总结了两个标准年预计雷击次数计算方法的局限性与合理性,以期为雷电防护设计和雷击风险评估等工作提供依据。

According to the calculation method of the number of lightning per annum in buildings given in national standard GB 50057-2010 and international standard IEC 62305-2:2010, the three components of the correction/location factor, the lightning ground flash density where the building located and the equivalent area of buildings were compared and analyzed respectively. The relationship between the ratio of the annual number of lightning in two standards and the length, width and height of the building was studied under different conditions. The limitations and rationality of the calculating methods of the annual number of lightning in two standards were summarized in order to provide a basis for the design of lightning protection and lightning risk assessment.